Event between (471272) 11FY9 and star UC4-397-056202 with event index number of 145081
Geocentric closest approach at 2018/05/22 13:06:14 UTC
J2000 position of star is 14:24:15.2 -10:46:05
Equinox of date position of star is 14:25:13.1 -10:50:55
Stellar brightness R=12.9,
use SENSEUP=32
Star is 61 degrees from the moon.
Moon is 54% illuminated.
TNO apparent brightness V=21.7
TNO is 20.1 AU from the Sun
and 19.1 AU from the Earth.
The TNO is moving 21.3
km/sec on the sky relative to the star, or,
5.5 arcsec/hr.
The 1-sigma error in the time of the event is 295 seconds.
The 1-sigma cross-track error in the shadow position is
4465 km.
The TNO has an absolute magnitude Hv=8.6
Diameter=114.8 km assuming a 5% albedo -- 5.4 sec chord
Diameter=46.9 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
Star training set for 471272, (2018/05/22 13:06UT) Object RA Dec mag sep mel Spica 13:26:09.9 -11:15:24 1.0 14.50 48 27Bet Lib 15:17:59.9 -09:26:59 2.6 13.06 73 2 Lib 14:24:25.2 -11:47:50 6.2 0.97 61 PPM 228674 14:22:48.5 -10:45:00 8.2 0.61 60 PPM 228737 14:25:14.0 -10:52:59 9.5 0.03 61 471272 14:25:14.6 -10:51:03 12.9 61 Positions are for equinox of date
Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.
Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.
Star training set for 471272, (2018/05/22 13:06UT) Object RA Dec mag sep mel Spica 13:25:11.5 -11:09:41 1.0 14.50 48 27Bet Lib 15:17:00.3 -09:22:59 2.6 13.06 73 2 Lib 14:23:25.6 -11:42:52 6.2 0.97 61 PPM 228674 14:21:49.2 -10:40:01 8.2 0.61 60 PPM 228737 14:24:14.7 -10:48:01 9.5 0.03 61 471272 14:24:15.2 -10:46:05 12.9 61 Positions are for J2000
Event circumstances last updated at 2017/12/02 17:33:40 UT
Marc W. Buie, Southwest Research Institute